Sliding-door latch.



J. A. GIESE.

SLIDING DOOR LATCH.

APPLICATION FILED 111111: 14, 1911.

1,003,896. Patented Sept. 19,1911.

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J. A, GIESE.

SLIDING DOOR LATCH.

APPLICATION FILED JUNE 14, 1911.

' 1,003,896. Q Patented Sept. 19,1911.

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E I -dmesejzesa COLUMBIA PLANOORAPN 50., WASHINGTON. D. t.

UNITED STATES PATENT OFFICE.

JAMES A. GIESE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE ADAMSKL WESTLAKE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SLIDING-DOOR LATCH.

Specification of Letters Patent.

Application filed June 14, 1911.

Patented Sept. 19, 1911. Serial No. 633,050.

T 0 all whom it may concern:

Be it known that 1, JAMES A. Cruise, a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Sliding-Door Latches, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to latches for sliding doors, its objects being to provide a latch the controlling handle of which may be locked independently of the latching memher and in connection with which a latching member is provided for securing the door in open position and which is controllable by the handle when the latter is or is not locked with reference to its relation to the forward latching member.

An embodiment of the invention is fully hereinafter described and is illustrated in the accompanying drawings in which- Figure 1 is a detail elevation of a door and its casing provided with the improved latch, the kee er mechanism for the forward or closing atch being shown in section; Fig. 2 is a vertical section, partly in elevation of the latch casing; Fig. 3 is a detail inside elevation of one of the faces of the casing of the latch, the controlling spindle being shown in section, and Fig. 4 is a sectional View on the line 44 of Fig. 3.

The door is represented at 10, the forward j amb of the casing at 11 and the rearward jamb at 12. The latch proper is inclosed within a casing 13 mortised into the forward edge of the door and being provided with a face plate l lthrough which securing screws may be set. Face plates 15, 16, are applied to the sides of the door and within them there is j ournaled the controlling spindle 17 which passes through the casing 13 and carries at each end a handle 18, 19 which preferably project upwardly.

The latching member for securing the door when closed takes the form of a hook 20 located within the casing 13 and pivoted upon a stud 21 set in the side walls thereof. A spring, as 22, fixed upon a stud 23 set in the walls of the casing bears downwardly upon the hook 20 and normally holds it against a stop 24. The swinging end of the hook lies entirely within the casing and is inclined or rounded in order that it may be forced upwardly against the resistance of the spring 22 by its engagement with the keeper.

The keeper 25 takes the form of a reciprocable bolt having a hook or shoulder 26 adjacent its forward end, this bolt being housed within a casing 27 mortised into the j amb 11, the keeper normally being retracted so that its forward end does not project beyond the face of the casing. A plunger 28 is mounted in the casing 27 and normally projects beyond its forward face. A lever 29 pivoted within the casing 27 engages shoulders upon the keeper and upon the plunger so that these two 'members move simultaneously but in opposite directions. A spring 30 normally holds the plunger in its advanced and the keeper in its retracted position. \Vhen the door is closed its forward edge forces the plunger 28 inward, thus advancing the keeper and causing its ongagement with the hook 20. A follower arm 31 fixed upon the spindle 17 bears upwardly against the hook 20. Pressure u on either of the handles 18, 19 which tents to urge the door open turns the spindle and thus raises the hook 20 out of engagement with the keeper.

An arm or shoulder 32 projects downwardly from the hub of the follower 31 and a locking bolt 33 slidingly mounted upon one of the side plates, as 15, may be projected into the path of the arm or shoulder 32 thereby locking the handles 18, 19 against movement in the direction necessary for raising the hook. The bolt is provided with a shoulder 31 for engagement by a key (not shown) which may be inserted through the key hole Suitable tumblers, as 36, may be provided for preventing theuse of other than the key specially adapted to the look. A hook 37, here shown as in loop form, is provided for securing the door in its open position and cooperates with a keeper 38 in hook form secured to the jamb 12. The hook or loop 37 is loosely pivoted upon the spindle 17 adjacent one of its ends and outside of the face plate, as 16, and is provided with a shoulder 39 for engagement by a stud 40 projecting from the hub of the adjacent handle, as 19, whereby the hook or loop 37 is raised when the handle is moved in the direction which tends to close the door. A spring 41 is provided for normally holding the hook or loop 37 in its lower or ad vanced position. This spring may be conveniently attached to a stud 42 on the inner face of the plate 16 and engaging the hook or latch 37 through the medium of a stud 43 formed thereon and projecting through a segmental slot 44: in the plate 16. The handles are held in central position by the spring 22 and a spring 45, here shown as formed integral with the spring 22, which bears downward on a swinging arm t6 pivoted on the stud 21 and engaging a rearwardly projecting arm l'? of the follower 31. The arm as oscillates between stops 48, 49, resting upon the latter and the hook 2O resting upon the stop Qt when the handles are in central position.

Movement of the handles and consequently of the spindle in either direction has the effect of raising one of the hooks 20 and 37, without acting upon the other. When the bolt 33 is advanced by the key it prevents the movement of the spindle in the direction necessary to raise the hook 20 but leaves it entirely free to move in the opposite direction for raising the hook 37. This looking mechanism, however, has no eifect upon the hook 20, leaving it free to move upward when it comes into engagement with the keeper 25 as the door is closed. The locking bolt may, therefore, be thrown at any time, when the door is open or closed. The latch is primarily designed for use in connection with car doors. It is customary to lock the doors of cars when they are not in use. The attendant often finds it necessary to work rapidly and this latch will permit him to go through a train of cars and throw. the locking bolts in their doors while the latter remain open, permitting the passengers to leave the cars at their leisure. \Vhen the cars are emptied the doors may be closed and cannot be opened without the use of the key. This closing of the doorsis not in the slightest interfered with by the fact that the bolt is thrown as the hook 37 may be disengaged from its keeper by merely turning the spindle in the required direction and the hook 20 will automatically engage its keeper as the door makes contact with the jamb 11.

I claim as my invention 1. In a door latch, in combination, a casing, a spring actuated latching element pivoted to the casing, a spindle projecting through the casing, a handle fixed to the spindle, a follower fixed to the spindle and engageable with the latching element to retract the same, a lateral shoulder on the follower, and a bolt movable into the path of the shoulder.

2. In a dOOr latch, in combination, a forwardly projecting spring actuated latching element, a rearwardly projecting spring actuated latching element, such two elements being independently movable, an oscillatable spindle having a handle fixed thereto and adapted to retract such latching elements respectively, when moved in opposite directions.

3. In a door latch, in combination, a forwardly directed spring advanced pivoted latch, a rearwardly directed spring actuated pivoted latch, an oscillatable spindle for retracting such latches independently, and a lock for holding the spindle against movement in one direction only.

4. In a door latch, in combination, a forwardly directed spring advanced pivoted. latching element, an oscillatable spindle, a follower fixed upon the spindle and engageable with the latch to move it in opposition to the spring, a rearwardly directed spring actuated latch loosely pivoted upon the spindle and a shoulder on the spindle engageable with the rearwardly projecting latch to move it in opposition to its spring.

5. In a door latch, in combination, a forwardly directed spring advanced pivot-ed latching element, an oscillatable spindle, a follower fixed upon the spindle and engageable with the latch to move it in opposition to the spring, a rearwardly directed spring actuated latch loosely pivoted upon the spindle, a shoulder on the spindle engageable with the rearwardly directed latch to move it in opposition to its spring and a locking bolt engageable with the spindle for holding it against action upon the forwardly directed latch, the spindle being free to move to act upon the rearwardly directed latch.

JAMES A. GIESE.

itnesses LOUIS K. GILLSON, MARIE TAPY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

